Question 1

Repair of damaged neurons can be assisted by certain neurotrophic factors secreted by the

Accepted Answer

A)  cell body only. 
B)  axon only. 
C)  dendrites only. 
D)  Schwann cells only. 
E)  axon and dendrites. 
A)  cell body only. 
B)  axon only. 
C)  dendrites only. 
D)  Schwann cells only. 
E)  axon and dendrites.

Question 2

The addition of several stimuli arriving from different locations on the same cell to produce an action potential is called ________.

Accepted Answer

The answer of The addition of several stimuli arriving from...

Question 3

What stops the rising phase of the action potential?

Accepted Answer

A)  The K⁺ gate closes. 
B)  The Na⁺ activation gate opens. 
C)  The Na⁺ inactivation gate closes. 
D)  The Na⁺ inactivation gate opens. 
E)  The sodium activation gate closes. 
A)  The K⁺ gate closes. 
B)  The Na⁺ activation gate opens. 
C)  The Na⁺ inactivation gate closes. 
D)  The Na⁺ inactivation gate opens. 
E)  The sodium activation gate closes.

Question 4

Why is it necessary for fast axonal transport to go both forward and backward?

Accepted Answer

The organelles and cellular components t

Question 5

Identify the False statement.

Accepted Answer

A)  EPSPs that reach threshold can initiate an action potential. 
B)  The trigger zone is the integrating center of the neuron. 
C)  IPSPs depolarize the membrane. 
D)  All of the statements are True. 
A)  EPSPs that reach threshold can initiate an action potential. 
B)  The trigger zone is the integrating center of the neuron. 
C)  IPSPs depolarize the membrane. 
D)  All of the statements are True.

Question 6

Match the term with its description (answers may be used more than once).
-cells that form supportive capsules around cell bodies

Accepted Answer

A) ependymal cells 
B) astrocytes 
C) satellite cells 
D) Schwann cells 
E) oligodendrocytes
F)microglia 
A) ependymal cells 
B) astrocytes 
C) satellite cells 
D) Schwann cells 
E) oligodendrocytes
F)microglia

Question 7

Explain the two reasons why graded potentials lose strength as they move through the cell.Why don't action potentials lose strength?

Accepted Answer

As a depolarization wave moves through t

Question 8

In a(n)________ synapse, there is a direct physical connection between cells.

Accepted Answer

The answer of In a(n)________ synapse, there is a direct...

Question 9

The absolute refractory period of an action potential

Accepted Answer

A)  only ensures one-way travel down an axon. 
B)  only allows a neuron to ignore a second signal sent that closely follows the first. 
C)  only prevents summation of action potentials. 
D)  ensures one-way travel down an axon and allows a neuron to ignore a second signal sent that closely follows the first. 
E)  ensures one-way travel down an axon, allows a neuron to ignore a second signal sent that closely follows the first, and prevents summation of action potentials. 
A)  only ensures one-way travel down an axon. 
B)  only allows a neuron to ignore a second signal sent that closely follows the first. 
C)  only prevents summation of action potentials. 
D)  ensures one-way travel down an axon and allows a neuron to ignore a second signal sent that closely follows the first. 
E)  ensures one-way travel down an axon, allows a neuron to ignore a second signal sent that closely follows the first, and prevents summation of action potentials.

Question 10

When sodium channels open during an action potential, the opening is caused by

Accepted Answer

A)  binding of sodium ions. 
B)  binding of potassium ions. 
C)  presence of calcium. 
D)  presence of positive charge. 
A)  binding of sodium ions. 
B)  binding of potassium ions. 
C)  presence of calcium. 
D)  presence of positive charge.

Question 11

In order for a synapse to be an effective means of cellular communication, slow removal or inactivation of neurotransmitter molecules from the synapse is important.

Accepted Answer

A) True 
 B)False

Question 12

Match the part of the neuron to its description (answers may be used more than once).
-supported by satellite cells

Accepted Answer

A) dendrites 
B) axon 
C) cell body 
A) dendrites 
B) axon 
C) cell body

Question 13

The potential difference across a membrane or other barrier is a measure of the ________ across the barrier.

Accepted Answer

The answer of The potential difference across a membrane or...

Question 14

In order to signal a stronger stimulus, action potentials become

Accepted Answer

A)  higher in amplitude only. 
B)  more frequent only. 
C)  longer-lasting only. 
D)  higher in amplitude and more frequent. 
E)  higher in amplitude and longer-lasting. 
A)  higher in amplitude only. 
B)  more frequent only. 
C)  longer-lasting only. 
D)  higher in amplitude and more frequent. 
E)  higher in amplitude and longer-lasting.

Question 15

Anterograde and retrograde axonal transport are forms of ________ transport.

Accepted Answer

A)  fast 
B)  slow 
C)  Neither of these. 
A)  fast 
B)  slow 
C)  Neither of these.

Question 16

The term axonal transport refers to

Accepted Answer

A)  the release of neurotransmitter molecules from the axon. 
B)  the transport of microtubules to the axon for structural support. 
C)  vesicle transport of proteins and organelles down the axon. 
D)  the movement of the axon terminal to synapse with a new postsynaptic cell. 
E)  None of the answers are correct. 
A)  the release of neurotransmitter molecules from the axon. 
B)  the transport of microtubules to the axon for structural support. 
C)  vesicle transport of proteins and organelles down the axon. 
D)  the movement of the axon terminal to synapse with a new postsynaptic cell. 
E)  None of the answers are correct.

Question 17

Which is the correctly written Nernst equation?

Accepted Answer

A)  61/z × log [ion]ₒᵤt / [ion]ᵢn 
B)  61/z × log [ion]ᵢn / [ion]ₒᵤt 
C)  log 61/z × [ion]ᵢn / [ion]ₒᵤt 
D)  log 61/z × [ion]ₒᵤt / [ion]ᵢn 
A)  61/z × log [ion]ₒᵤt / [ion]ᵢn 
B)  61/z × log [ion]ᵢn / [ion]ₒᵤt 
C)  log 61/z × [ion]ᵢn / [ion]ₒᵤt 
D)  log 61/z × [ion]ₒᵤt / [ion]ᵢn

Question 18

The region where the axon terminal meets its target cell is called the

Accepted Answer

A)  collateral. 
B)  hillock. 
C)  synapse. 
D)  nerve. 
E)  dendrites. 
A)  collateral. 
B)  hillock. 
C)  synapse. 
D)  nerve. 
E)  dendrites.

Question 19

The axon is connected to the cell body by the

Accepted Answer

A)  myelin sheath. 
B)  axon terminal. 
C)  collaterals. 
D)  axon hillock. 
E)  synapse. 
A)  myelin sheath. 
B)  axon terminal. 
C)  collaterals. 
D)  axon hillock. 
E)  synapse.

Question 20

The resting membrane potential results from

Accepted Answer

A)  uneven distribution of ions across the cell membrane only. 
B)  differences in membrane permeability to Na⁺ and K⁺ only. 
C)  activity of the sodium/potassium pump only. 
D)  uneven distribution of ions across the cell membrane and differences in membrane permeability to Na⁺ and K⁺. 
E)  None of the answers are correct. 
A)  uneven distribution of ions across the cell membrane only. 
B)  differences in membrane permeability to Na⁺ and K⁺ only. 
C)  activity of the sodium/potassium pump only. 
D)  uneven distribution of ions across the cell membrane and differences in membrane permeability to Na⁺ and K⁺. 
E)  None of the answers are correct.

Exam 8: Neurons: Cellular and Network Properties

Repair of damaged neurons can be assisted by certain neurotrophic factors secreted by the

The addition of several stimuli arriving from different locations on the same cell to produce an action potential is called ________.

What stops the rising phase of the action potential?

Why is it necessary for fast axonal transport to go both forward and backward?

Identify the False statement.

Match the term with its description (answers may be used more than once). -cells that form supportive capsules around cell bodies

Explain the two reasons why graded potentials lose strength as they move through the cell.Why don't action potentials lose strength?

In a(n)________ synapse, there is a direct physical connection between cells.

The absolute refractory period of an action potential

When sodium channels open during an action potential, the opening is caused by

In order for a synapse to be an effective means of cellular communication, slow removal or inactivation of neurotransmitter molecules from the synapse is important.

Match the part of the neuron to its description (answers may be used more than once). -supported by satellite cells

The potential difference across a membrane or other barrier is a measure of the ________ across the barrier.

In order to signal a stronger stimulus, action potentials become

Anterograde and retrograde axonal transport are forms of ________ transport.

The term axonal transport refers to

Which is the correctly written Nernst equation?

The region where the axon terminal meets its target cell is called the

The axon is connected to the cell body by the

The resting membrane potential results from

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

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